As we all know that,there are logical relations and many constraints(Such as primary constraint and secondary constraint) between or in activities. The question are:
1.when the two above have conflicts with each other , which is more important ? In network , we can calculate the time parameters only with the activity duration start time and logical relations between activities , although there are many bugs in the kind of method , while if I'd like to use the constraints listed in P3 ,
///Start constraints

///Start on

///Start on or after

///Start on or before

///Finish constraints

///Finish on

///Finish on or after

///Finish on or before

///Mandatory constraints

///Start

///Finish

///Late constraint

///As late as possible

How should I do ?

2.After we add the constraints , will the float time change ? and how to deal with it ?